How do I remove the virus #5.7.1?

Question

I know absolutely nothing about removing them.
Thanks in advance.

Maybe I should specify: In simple English.
as much as I do appreciate the answers, I just don't understand it. I tried the "Free" scanning, which then charge you if you want to have it cleaned. Technical stuff really discourage me. I can't get it in plain English.

Answer 1

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Answer 2

The four most common causes for these NDRs are the following:

NDRs that contain a 5.7.1 error code occur if the Allow computers which successfully authenticate to relay check box is not selected on the Simple Mail Transfer Protocol (SMTP) virtual server.

To locate this check box:
In Exchange System Manager, expand Servers, expand the container for your server, expand Protocols and then expand SMTP.
Right-click the SMTP virtual server, and then click Properties.
Click the SMTP virtual server's Access tab, and then click Relay.
NDRs that contain a 5.7.1 error code occur if the Domain Name System (DNS) tables are not configured correctly. Ensure that mail exchanger (MX) records point to the correct SMTP virtual server. If DNS is not configured correctly, incoming SMTP connection attempts might randomly connect to the wrong SMTP virtual server.

Although the DNS records exist that point the domain to the server running Exchange 2000, the matching recipient policy might not exist. Recipient policies control the behavior of SMTP in addition to the proxy addresses that are stamped on users. For each domain supported by your DNS configuration, there should be a recipient policy. For more information about creating or updating recipient policies, see "To create new recipient policies," later in this tip.
NDRs that contain a 5.7.1 error code occur if users have e-mail addresses that were created manually but do not match any existing recipient policies. As a general rule, proxy addresses should match at least one recipient policy. For more information about creating or updating recipient policies, see "To create new recipient policies," later in this tip.
5.7.1 and 5.7.3 errors might also occur if you are using Microsoft Internet Security and Acceleration (ISA) Server 2000. If the external IP address of the server running ISA Server changes, and the IP address for the SMTP publishing rule is not updated to reflect the new IP address, an NDR results. In addition, if you do not restart the Isactrl service after changing the IP address in the SMTP publishing rule, an NDR results.
To create new recipient policies
In Exchange System Manager, expand the Recipients object, then expand the Recipient Policies object.
Right-click Default Policy, and then click Properties.
To add a new SMTP address, on the E-Mail Addresses tab, click Add.
In the SMTP Address Properties dialog box, in Address, type the domain you use for the manually entered e-mail addresses.
In the Default Policy Properties dialog box, click the E-Mail Address tab, and then click to select the check box next to the SMTP address that you just created.
Click Apply. Click OK when you receive the following notification:


The e-mail addresses of types [SMTP] have been modified. Do you wantto update all corresponding recipient e-mail addresses tomatch these new addresses?
If you want to update these addresses immediately, force the Recipient Update Service to update your organization and your server running Exchange 2000.





This tip is provided by the Microsoft Exchange User Education team.

For additional information, see the Microsoft TechNet Exchange Web site

Answer 3

Scan the PC with a standard anti virus and an anti spy ware. If you need, I can give a few links that offer free virus and spy ware removers...!You may be having a virus or spyware installed on your PC. Norton, AVG , Avast are free antivirus software. Ad-aware, Ewido are free spy ware removers. You can download free softwares at
http://fixit.in/antivirus.html and http://fixit.in/spywareremover.html

Answer 4

not sure what virus that is
may want to try this online scan
www.housecall.trendmicro.com